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W. H. TAYLOR. Loo'k Cylinder.

No. 234,213. Patented Nov. 9,1880.

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By his fltzm'neys M PETERS. PNoro-umceawnm WASHINGTON, 0 cv UNITED STATES PATENT OFFICE.

WARREN H. TAYLOR, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE LOCK MANUFACTURING COMPANY, OF SAME PLACE.

LOCK-CYLINDER.

SPECIFICATION forming part of Letters Patent No. 234,213, dated November 9, 1880.

Application filed April 9, 1878.

To all whom it may concern:

Be it known that I, WARREN H. TAYLOR, of Stamford, in the county of Fairfield and State of Connecticut, have invented an Improvement in Look Hubs or Cylinders, of which the following is a specification.

The object of my invention is to form, in a cheap and simple manner, a key hub or cylinder with an angular, curved, or sinuous slot, such as is used in connection with a longitudinally grooved or corrugated sheet-metal key, having side bits or serrations like the wellknown security Yale-lock key.

My invention consists in forming such a keyhub wholly or in part of a series of correspondin g disks, suitably slotted.

One method I adopt in carrying out my invention is to take a number of these disks and lay one upon another with their slots coincident until a pile is formed of a height equal to the desired length of the hub, and then secure them all together by one or more longitudinal rivets, or by any other well-known mechanical means. I thus obtain a cylinder with a longitudinal, sinuous, or angular slot that will fit a suitably-shaped sheet-metal key on each side of its blade at all points when it is inserted in place; but it is not essential that the side walls of the slot shall impinge against the sides of the key-blade at all points, and hence I may, without departing from my invention or detracting from the value of my cylinder, form it in sections only part of which are corresponding sinuously slotted disks, and the rest of which are rectangularly-slotted parts or half-cylindrical blocks or other shaped filling-pieces, sufficiently cut away to leave an open path for the key, and serving merely to connect the coincident disks and help form the body of the hub, which, when in place in a lock, is out of sight, except its front end. Such a formation of the hub will give a sufficient fitting sinuous bearing-surface to guide the key during its insertion, and to be acted upon in turning it, for the operation of the look.

In the accompanying drawings, Figure l is a front end elevation of my key-hub. Fig. 2 is a side elevation of my hub, composed wholly of disks. Fig. 3 is a cross-section through one of the tumbler-recesses. Fig. 4 is a longitudinal section. Fig. 5 is a perspective view of one of the sinuously-slotted disks, detached. Fig. 6 is an elevation, showing the hub formed of three disks, one at each end and one in the middle, and two filling-sections, and turned so as to expose its under side to view; and Fig. 7 represents two different forms of fillingsections detached.

I can readily form my comparatively-thin sinuously-slotted disks of uniform shape and size by stamping with dies, and the other shaped sections, which may be thicker, can be formed in that way and in various other ways well known to metal-workers but the way I recommend is to cut them from properlyshaped drawn stock. I may form the pile to constitute the hub according to either detail method above described by laying the parts one upon another in a vertical tube or cup having a guidefeather, and thus securing them together, or by laying them one against another in a horizontal semicircular holder, and afterward securing them together.

Where hubs have been provided with straight radial slots it has been easy to make them by grooving a solid cylinder longitudinally; but it requires special appliances to form sinuous slots that shall be uniform in depth and contour in different hubs made of solid cylinders, and their formation has been attended with much difficulty; hence the utility of my invention, by which there is left no obstacle to the economical and rapid formation of lockhubs with irregular-shaped longitudinal slots exactly alike, and adapted for the reception of correspondingly corrugated sheet metal keys.

I do not broadly claim a revolving hub or cylinder having a sinuous slot therein.

What I claim as new, and desire to secure by Letters Patent, is

A key-hub composed in whole or in part of sinnously or angularly slotted disks, substantially as described.

In testimony whereof I have hereunto subscribed my name.

WARREN H. TAYLOR.

Witnesses:

ScHUYLER MERRITT, CHAS. E. VAIL. 

